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Squaring Numbers

Multiplying Numbers

Dividing Numbers

Adding Numbers

Subtracting Numbers

Finding Percents

Calculation Practice Exercises

Full List

four 4's (number of digits in number) 4 4 4 4 three 8's (one fewer) 8 8 8 a final 9 9

See the pattern?

three 4's 4 4 4 two 8's 8 8 a final 9 9

Use a big number - others will need a powerful calculator or lots of time to check your answer!

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